JPH03295774A - Suspension for tire-drive type crawler belt running device - Google Patents

Abstract

PURPOSE:To improve the siding comfortableness and the ground following property of crawler belts by swayably suspending and supporting the right and left axle support members supporting drive wheels and idle wheels in a running device suspended with crawler belts on drive wheel tires and idle wheel tires. CONSTITUTION:Idle wheels 15 are arranged between front wheels 11 and rear wheels 13, tires 12, 14, 16 are fitted on the wheels respectively, crawler belts 17 are suspended across the rear wheel tires 14 and idle wheel tires 16 in a crawler belt type six-wheel vehicle, and the rear wheels 13 and idle wheels 15 are pivotally supported on swing beams 31 serving as axle support members. The swing beams 31 are independently suspended and supported by rear suspensions 32 against a vehicle body 1. The center sections of the swing beams 31 are swayably connected to leaf springs 33 suspended below a load carrying platform 3, hydraulic dampers 34, 35 are provided between the front and rear sections and the load carrying platform 3, and an axle beam 36 is provided between rear sections of the right and left swing beams 31, 31.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a suspension system for a tire-driven crawler belt traveling device provided on the left and right sides of a vehicle body.

[Prior Art] Tire-driven crawler belt running in which a rubber crawler belt is hung over a drive wheel tire and an idler tire, and left and right axle support members are provided to support both the drive wheel and idler wheel. The device is known from Japanese Patent Publication No. 48-41288.

[Problem to be Solved by the Invention] When the tire-driven crawler belt traveling device described above is installed on the rear wheel side of a passenger vehicle, it is a problem to ensure the ride comfort of the vehicle and the ground following ability of the crawler belt. becomes.

Therefore, an object of the present invention is to provide a suspension system for a tire-driven crawler belt traveling device installed on the left and right sides of a vehicle body, which ensures ride comfort and ground following ability while also being easy to maintain, such as attaching and detaching crawler belts and tires. Our goal is to provide the following.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention has a crawler belt attached to the driving wheel tires and idle wheel tires respectively arranged on the left and right sides of the vehicle body. Left and right axle support members that support both idle wheels are provided, and the left and right axle support members are each swingably suspended from the vehicle body, and the axle support members are disposed toward the inside of the vehicle body relative to the tires. It is characterized by what it did.

[Function] This is an independent left and right suspension system in which the left and right axle support members, which support both the drive wheels and idle wheels with crawler belts attached to the tires, are suspended and supported in a swingable manner relative to the vehicle body.
The ride comfort of the vehicle and the ground tracking ability of the crawler belt are improved.

Since the axle support member is disposed further inward of the vehicle body than the tires, the crawler belt and tires can be easily attached and removed from the outside of the vehicle body, resulting in excellent maintainability.

[Example] Examples will be described below based on the accompanying drawings.

In FIGS. 1 to 4 showing the configuration of a light truck-type crawler belt type six-wheeled vehicle as an application example of the present invention, l
is the vehicle body, 11 is the front wheel, 13 is the rear wheel, 15 is the idle wheel, 17
is a crawler belt.

The vehicle body 1 is composed of a cabin 2 and a loading platform 3, and as shown in the figure, idle wheels 15 are disposed between a front wheel 11 and a rear wheel 13, and tires 12, 14 and 16 are mounted on each wheel, respectively. ing. A steering device 5 is configured to transmit steering force from a handle 4 in the cabin 2 to a pair of left and right front wheels 11,11. The steering device 5 includes a steering shaft 6, a gear box 7, a steering arm 8, a tie rod 9, etc., and the tie rod 9 is connected to a knuckle 21 that supports a front wheel 11. Furthermore, a front suspension 22 is provided which independently suspends and supports the front wheel 11 with respect to the vehicle body 1, that is, a front suspension 22 is provided below the cabin 2 of the vehicle body 1 and the front wheel knuckle 2.
1, suspension components such as a radius rod 23 and a hydraulic damper 24 are installed.

On the other hand, an engine 25 is mounted and supported under the cargo bed 3 of the vehicle body 1, and a rear wheel 13 and an idler wheel 15 are arranged on both left and right sides of the engine 25. A rear wheel drive device 26 is configured to transmit rotational driving force from a transmission integrated with the engine 25 to a pair of left and right rear wheels 13,13. The rear wheel drive device 26 is a differential device 2 at the rear of the engine 25.
7 and a rear wheel drive shaft 28, and the rear wheel drive shaft 28 is connected to a rear wheel axle 29 supported at the center of the swing beam 31.

The rear wheel 13 and the idle wheel 15 in front of the rear wheel 13 are supported by the swing beam 31, which serves as an axle support member, and a rear suspension 32 is provided to independently suspend and support the swing beam 31 with respect to the vehicle body 1. That is, the central part of the swing beam 31 is swingably connected to a leaf blink 33 installed under the loading platform 3 of the vehicle body 1, and hydraulic dampers 34 and 35 are installed between the front and rear of this swing beam 31 and the bottom of the loading platform 3. In addition, the left and right swing beams 31
, 31 Torsion-free axle beam 3 between the rear
6 are being constructed.

In the figure, 36a is a torque canceling part at the center of the axle beam 36, 37 is a stopper rubber on the center of the leaf spring 33, 38 is a shackle at the rear end of the leaf splinter 33, and 301 is a subvert installed below the loading platform 3. Links racket, 302 is the same shackle racket, 304
, 305 is the same tamper bracket.

Further, a crawler belt 17 made of rubber is attached to the rear tire 14 and the idler tire 16, and garters 19 are attached to both sides of the tread portion 18 of the crawler belt 17.
・, 19... are provided by being erected inward. The front part of the swing beam 31 is provided with an eccentric hub carrier 41 that can be pivoted by a pivotal connection, and an idle wheel axle 39 is supported on the hub carrier 41. The tension of the crawler belt 17 is adjusted by eccentrically rotating the hub carrier 41 that supports the idle wheel axle 39 as will be described later. The crawler belts 17 and 17 described above are accommodated within the widthwise dimension of the vehicle body 1.

Furthermore, a front wheel drive device 42 is configured to transmit rotational driving force from a transmission integrated with the engine 25 to a pair of left and right front wheels 11,11. The front wheel drive device 42 includes a propulsion shaft 43 extending in front of the engine 25, a differential device 44, and front wheel drive shafts 45, 45, and the front wheel drive shaft 45 is connected to a front wheel axle 46 supported on the knuckle 21. In the figure, 47 is a fuel tank, 48 is a battery, and 49 is a muffler.

The above crawler belt type 6-wheel vehicle has a ground contact driving force from the left and right crawler belts 17.17 and a front tire 12.12.
Due to the ground contact driving force, it has excellent drivability not only on general roads but also on soft ground such as farmland and uneven ground such as sand, snow, and gravel. Since the crawler belt 17 is kept within the widthwise dimension of the vehicle body 1, the crawler belt 17 does not protrude to the side of the vehicle body 1, making it compact without increasing the overall width of the vehicle, and obtaining light vehicle type approval. Furthermore, like general vehicles, it is possible to drive on public roads at relatively high speeds, and in particular, it can be driven into farmland and used as a vehicle for transporting agricultural machinery and materials such as fertilizer. In addition, the front wheels 11 are independently suspended, and
Rear wheel 13 and idle wheel 15 on which crawler belt 17 is attached
Since it has independent suspension, it also offers excellent ride comfort.

The suspension system of the tire-driven crawler belt traveling device described above is shown in an enlarged scale in FIG.

The pivoting structure of the left and right swing beams 31 and leaf springs 33 is shown in FIG. 6, and the crawler belt 17
Details of the tensioner operating mechanism are shown in Figures 7 and 8.
Furthermore, the support structure for the rear wheels 13 is as shown in cross section in FIG.

First, in FIG. 6, 51 is a pivot bracket, 52
53 is a pivot shaft, and 53 is a pivot case. That is, the pivot case 5 fixed at the center of the swing beam 31
3 through a pivot shaft 52, a pair of left and right bearings 54 and 54 are interposed between the shaft 52 and the case 53, and a nut 55 is screwed into the threaded portion at the tip of the shaft 52. There is. Then, on the pivot bracket 51, the center portion of the illustrated three-ply leaf spring 33 is sandwiched between plates 56.
U bolts 57, 57 and nuts 5 are attached to the front and rear of the plate 56.
8... is connected to the pivot bracket 51.

With such a pivot structure, the swing beam 31 swings around the pot center point 0 in the center, which improves the ground followability of each crawler belt 17 when running on soft ground such as farmland or uneven ground such as sand, snow, gravel, etc. is what you can get.

Further, in FIGS. 7 and 8, 60 is a tensioner operation mechanism, 61 is a ohm, and 66 is a worm wheel.As shown in the figure, the ohm wheel 66 is housed in the front part of the swing beam 31 in the shape of a hollow vibrator, and the swing A ohm 61 is housed in an ohm holder 62 fixed to the front open end of the beam 31. The ohm 61 is fitted with serrations into a vertical shaft 63, and the shaft 63 is rotatably supported by an ohm holder 62 at the top and bottom. We are prepared.

The ohm wheel 66 meshes orthogonally with the ohm 61.
is serrated fitted to a shaft 67 in the vehicle width direction, and the shaft 67 is rotatably supported in front of the left and right swing beams 31, and the hub carrier 41 is attached to the shaft portion of the shaft 67 that protrudes outward from the swing beam 31. are fitted with serrations. The idle wheel axle 39 is rotatably supported by the hub carrier 41 via a pair of left and right bear links 69,69. In the diagram, 71 is the wheel hub, 72 is the center nut, 73 is the hub bolt, and 7
4 is a wheel nut, 75 is an axle collar, 76 is a nut for the ohm wheel shaft 67, 77 is the same washer, and 78.79 is a spacer on both sides of the ohm wheel 66.

Since the tensioner operating mechanism 60 using a worm gear mechanism is provided at the pivot point of the hub carrier 41 that supports the idle wheel axle 39 to the swing beam 31, the ohm shaft 6
When a rotational operating force is applied to the hexagonal head 65 of No. 3, the
1 rotation, the ohm wheel 66 with a large reduction ratio gradually rotates, that is, the hub carrier 41 swings along an arcuate locus in the front and rear as shown in FIG. This causes the idler wheels 15 to move back and forth, thereby adjusting the crawler belt 17 to an appropriate tension state.

The above tension adjustment of the crawler belt 17 is performed using the worm 66.
, and only a small amount of rotational force is required. And the shaft 6 connected to the hub carrier 41
The section from the ohm wheel 66 side provided at 7 to the ohm 61 side that performs the rotation operation has a self-locking function against external force, thereby preventing loosening due to vibration or the like. Furthermore, the worm shaft 63 to be rotated is connected to the swing beam 3.
Since the hexagonal head 65 faces upward, the ohm shaft 63 can be easily rotated by inserting a hand inside from the front of the idler wheel 15.

Further, in FIG. 9, reference numeral 81 denotes a hub carrier fixed to the rear of the swing beam 31, and the drive wheel axle 29 is rotatably supported by the hub carrier 81 with a pair of left and right bearings 82, 82 interposed therebetween. There is. In the figure, 83 is a wheel hub, 84 is a center nut, 85 is a center cap, 86 is a hub bolt, 87 is a wheel nut, 88
is the axle collar, and 89 is the brake drum.

In the above tire-driven crawler belt traveling device,
As shown in Figures 183 and 4 and Figures 8 and 9, which are enlarged views of the main parts on one side, there are hub carriers 41.81 at the front and rear.
The swing beam 31 provided with the driving wheel tire 14
The crawler belts 17 and tires 14 and 16 can be easily attached and removed from the outside of the vehicle body 1 (loading platform 3), making maintenance easier. It has excellent characteristics.

The tensioner operation mechanism 60, which adjusts the tension of the crawler belt 17 by swinging the idle wheel hub carrier 41 provided in the front part of the swing beam 31, is located inside the vehicle body l (loading platform 3) than the tire-driven crawler belt traveling device. Since the tensioner operating mechanism 60 is located in this direction, the tensioner operation mechanism 60 is also excellently protected from obstacles from outside the vehicle body 1 (cargo platform 3).

In the embodiment, the present invention is applied to a light truck, but the present invention can also be applied to light vehicles such as one-box type vehicles and other types of vehicles. Further, the idle wheels and the rear wheels may be arranged at the front and rear.

[Effects of the Invention] As described above, according to the present invention, the left and right axle support members that support both the driving wheel and the idler wheel, each of which has a crawler belt attached to the tire, are suspended so as to be swingable relative to the vehicle body. Since the suspension system has an axle support member placed further inward of the vehicle body than the tires, the left and right independent suspension system improves vehicle ride comfort and the crawler belt's ability to follow the ground. The crawler belt and tires can be easily attached and detached from the outside of the vehicle body, making it easy to maintain.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view showing a crawler belt type six-wheeled vehicle as an application example of the present invention, Fig. 2 is a side view showing its drive device and suspension, etc., Fig. 3 is a plan view of the same, and Fig. 4 is 5 is an enlarged side view showing the suspension system of the tire-driven crawler belt traveling device, FIG. 6 is a sectional view taken along the arrow Vl-■ line in FIG. 5, and FIG. 7 is a tensioner operation An enlarged cross-sectional view of the mechanism seen from the side, Figure 8 is a cross-sectional view taken along the arrow ■-■ line in Figure 7, and Figure 9 is a cross-sectional view taken along the arrow IX-IX line in Figure 5. be. In addition, in the drawing, 1 is a vehicle body, 13 is a drive wheel, 14 is the same tire, 15 is an idle wheel, 16 is the same tire, 17 is a crawler belt, 31 is an axle support member (swing beam), 33 is a leaf spring, 41 is the idle wheel hub carrier, 52 is the pot shaft. 60 is a tensioner operating mechanism, and 81 is a drive wheel hub carrier.

Claims (1)

[Claims] Crawler belts are attached to the drive wheel tires and idle wheel tires respectively arranged on the left and right sides of the vehicle body, and left and right axle support members are provided to support both the drive wheels and the idle wheels, and the left and right axle supports are provided. 1. A suspension device for a tire-driven crawler belt traveling device, characterized in that members are each swingably suspended and supported relative to a vehicle body, and the axle support member is disposed inward of the vehicle body relative to the tires.